C-CEX.com Trusted, Secure & Friendly Exchange Since 2013. 200+ Alts,USD,Low Fees

[SebastianJu]

It should be simple to create a wallet for each delisted coin without having this wallet to be hosted on a server.

Sorry, we are not familiar with this tech. Please, explain better.

I write about a normal wallet that isn't running on your exchange for automatic use of your system. You can create a normal standard wallet the way each normal user of altcoins would use it on his home pc. Then import the privkeys of all the funded addresses that still hold coins of delisted altcoins. You might make a consolidation address in order to collect all of the remaining coins of that delisted coin in one single address.

Since you have all the stats and amounts of the coins still owned by your users you would be able to verify each claim of a user asking for getting back their coins.

[c-cex]

It should be simple to create a wallet for each delisted coin without having this wallet to be hosted on a server.

Sorry, we are not familiar with this tech. Please, explain better.

I write about a normal wallet that isn't running on your exchange for automatic use of your system. You can create a normal standard wallet the way each normal user of altcoins would use it on his home pc. Then import the privkeys of all the funded addresses that still hold coins of delisted altcoins. You might make a consolidation address in order to collect all of the remaining coins of that delisted coin in one single address.

Since you have all the stats and amounts of the coins still owned by your users you would be able to verify each claim of a user asking for getting back their coins.

It's near impossible for us to create tens of thousands of wallets and send each of them to each customer. Sorry, we consider our current removal procedure fair. We give a lot of time for withdrawals and we make a lot of announces about removal.

[c-cex]

Regarding broken blockchains.

Unfortunately we have many of them by now and looks like it's systematic problem which affect coin developers. Here is all information we have about this problem.

1. How we register deposits? We scan for incoming transactions and check if it has enough confirmations (set by coin developer as secure for each coin we have). After we have enough confirmation the deposit get posted to user balance.

2. What makes us consider coin blockchain broken? We verify already posted deposits which already had enough confirmations and find them invalid (they have confirmations: -1 or confirmations: 0). We verify those transactions in block explorer and find them there infact giving us strong evidence of broken blockchain because usually for good working blockchains it is impossible to see invalidated transactions in block explorer or addresses with negative balance.

3. How it happens? Here we can only make an assumption. Possibly blockchain cracker put big hashpower on blockchain he attack and make instant fork, creating fake transactions and pushing confirmations to it visible for all network including our wallet. After he remove hashpower network recovers and shows those transactions invalid with negative balances on addresses realted to it. During the time of confirmed fraud transactions attacker sell coins on market and withdraw BTC without delay. After network recover attacker may also withdraw good coins from our wallet in normal way because he has them on his balance from fraud deposits. In result attackers account has no BTC or attacked coins on balance and in most cases making our wallet empty which stops us from ability to provide withdrawals.

4. How we can protect our customers from this type of attack? Infact we can't. As most of blockchain has small block time it is impossible to detect fraud transactions fast because they looks like exactly as non-fraud for all network including our wallet and they have real confirmations with real blocks visible to all.

5. What can we advise to our traders? Please, always make your own research before trading any coin. We never vouch for any dev or coin owner. When you trade coin - you trust not only exchange but mostly coin developer. If you unsure about developer or quality of coin - do not trade that coin.

6. What should coin developers care to protect their coins from this kind of attack? First - they do not have copy paste code which has being used for 1000 times already without revision and deep understanding how cryptowallet and blockchain works. They have to care much about blockchain security with checkpoints, private nodes, monitoring servers etc.

We have nothing to do with broken blockchain unless developer offer some solution. Usually they fix wallet vulnerabilities and make swap or move to more reliable blockchains like ethereum, nxt or bitcoin.

[SebastianJu]

It should be simple to create a wallet for each delisted coin without having this wallet to be hosted on a server.

Sorry, we are not familiar with this tech. Please, explain better.

I write about a normal wallet that isn't running on your exchange for automatic use of your system. You can create a normal standard wallet the way each normal user of altcoins would use it on his home pc. Then import the privkeys of all the funded addresses that still hold coins of delisted altcoins. You might make a consolidation address in order to collect all of the remaining coins of that delisted coin in one single address.

Since you have all the stats and amounts of the coins still owned by your users you would be able to verify each claim of a user asking for getting back their coins.

It's near impossible for us to create tens of thousands of wallets and send each of them to each customer. Sorry, we consider our current removal procedure fair. We give a lot of time for withdrawals and we make a lot of announces about removal.

You only need one wallet per delisted altcoin. And the wallet is kept with you. That's all that's needed. Requests from users will drop in seldom anyway through support so you would pay out the coins manually on request after checking the validity of the claim in the logs.

[B26354]

Why is your bitcoin wallet not working?

[yorll]

SCAM ALERT

Be careful, this is not a joke, read all the back page witnesses, this exchange has become a scam, sooner or later will be scammed in some way. They Steal the money from the votes, open your eyes and do not let these scammers continue to deceive people.

[care2yak]

Heads up for people.

One of our community lost some BTC on C-cex due to his own error last week.

The error is easily fixable. The BTC remains in C-Cex control and in an address that is linked to the community member's account.  Indeed, c-cex have helped other community members with similar problems before. It is a two minute job to resolve.

Three different support tickets have resulted in three totally different answers that contradict each other.  

At best, their customer service is in a bit of a mess.  At worst, there is something concerning going on.

I'll will post here to update if we see a resolution.

 Exercise caution.

A follow up with this issue

The BTC has not been returned

We support tickets which have received three different responses.

Paraphrased responses as follows:

Ticket 1:  Sure, we'll recover your BTC and will do so as soon as the wallet is out of maintenance (the wallet wasn't in maintenance at the time).

Ticket 2:  It is physically impossible to recover your BTC.

Ticket 3:  We could recover your BTC but it would cost us $500 to do it so we won't.

We have issues with this for the following reasons:

1)  It is literally a 5 minute job to recover the BTC.
2)  It is DEFINITELY possible.  We have even told them how they did it before.
3)  C-CEX have performed identical recoveries several times in the last few months.
4)  If it costs them $500 to type dumpprivkey into a console then they have serious problems.


Clearly this is unacceptable and we are now advising members of our respective communities to avoid using C-Cex if at all possible.

This is worrying to say the least, hope you get this solved soon! For now I'll be moving my coins away from C-Cex, until this matter has been resolved with a clear explanation on their behalf..

@C-Cex
Please don't go down the same road as YoBit, they lost all their credibility as well.

OMG!!! Now I'm worried!!! I just made a deposit today. Block explorer now shows 29 confirmations for my deposit to my ccex btc wallet. But the amount is not yet reflected in my balance because their btc wallet is out of sync. Reading these reviews is making me worry every single minute. Will update when I get a response from ccex support.

[care2yak]

Update:

Support did respond and I received my bitcoins. Lesson learned: check wallet status first before making a bitcoin transfer 

[hopenotlate]

I deposited some thousand RBIES on my C-CEX depo address and even if transaction showed up correctly in blockexplorer those coins never reached my balance.

I wrote a support ticket, fullfilling all the required information, more than 36 hours ago but I'm still waiting for an answer from support. 

Is it "normal" for their service standard or is there something weird going on?  Anyone from support/staff follow this thread?

[yorll]

I deposited some thousand RBIES on my C-CEX depo address and even if transaction showed up correctly in blockexplorer those coins never reached my balance.

I wrote a support ticket, fullfilling all the required information, more than 36 hours ago but I'm still waiting for an answer from support.  

Is it "normal" for their service standard or is there something weird going on?  Anyone from support/staff follow this thread?

Do not waste your money and your time, this exchange is a confirmed scam. Read previous messages and pages. I recommend that you stay away from this exchange.

[c-cex]

I deposited some thousand RBIES on my C-CEX depo address and even if transaction showed up correctly in blockexplorer those coins never reached my balance.

I wrote a support ticket, fullfilling all the required information, more than 36 hours ago but I'm still waiting for an answer from support. 

Is it "normal" for their service standard or is there something weird going on?  Anyone from support/staff follow this thread?

Yes of course. If you have your ticket opened - please, wait and we will resolve this issue.

[c-cex]

OMG!!! Now I'm worried!!! I just made a deposit today. Block explorer now shows 29 confirmations for my deposit to my ccex btc wallet. But the amount is not yet reflected in my balance because their btc wallet is out of sync. Reading these reviews is making me worry every single minute. Will update when I get a response from ccex support.

This was resolved already.

[c-cex]

Why is your bitcoin wallet not working?

We had short maintenance. It is fixed already.

[hopenotlate]

I deposited some thousand RBIES on my C-CEX depo address and even if transaction showed up correctly in blockexplorer those coins never reached my balance.

I wrote a support ticket, fullfilling all the required information, more than 36 hours ago but I'm still waiting for an answer from support. 

Is it "normal" for their service standard or is there something weird going on?  Anyone from support/staff follow this thread?

Yes of course. If you have your ticket opened - please, wait and we will resolve this issue.

Yes I have my ticked opened: it's three days now and I only got a generic answer (wallet on mantainance without even an estimated ETA of this mantainance to be completed).

I'd suggest you to get in touch with Mammix2 ( Rubies wallet developer and blockchain specialist) https://bitcointalk.org/index.php?action=profile;u=227772 if you are having issues with RBIES wallet.

[c-cex]

I deposited some thousand RBIES on my C-CEX depo address and even if transaction showed up correctly in blockexplorer those coins never reached my balance.

I wrote a support ticket, fullfilling all the required information, more than 36 hours ago but I'm still waiting for an answer from support. 

Is it "normal" for their service standard or is there something weird going on?  Anyone from support/staff follow this thread?

Yes of course. If you have your ticket opened - please, wait and we will resolve this issue.

Yes I have my ticked opened: it's three days now and I only got a generic answer (wallet on mantainance without even an estimated ETA of this mantainance to be completed).

I'd suggest you to get in touch with Mammix2 ( Rubies wallet developer and blockchain specialist) https://bitcointalk.org/index.php?action=profile;u=227772 if you are having issues with RBIES wallet.

So you have answer from us - ok. Yes, sometimes wallet has problems and sometimes we can't give ETA when they going to be fixed by wallet devs. We will do our best to resolve it if it is possible to resolve by us at all.

[yorll]

And when are you going to return the money that you have stolen from the voters of Bikercoin and dinastycoin? If you are not cowards answer me.

Unfortunately, I know you're just some scammers and cowards and you're not going to answer.

[Raxitto]

The C-CEX exchange sent an email to its users notifying the removal of more than 40 altcoins currently listed on the platform. The company claims it needs to free up server resources to add new crypto-coins, and those selected for deletion have a very low trading volume. very understandable....

[hopenotlate]

I deposited some thousand RBIES on my C-CEX depo address and even if transaction showed up correctly in blockexplorer those coins never reached my balance.

I wrote a support ticket, fullfilling all the required information, more than 36 hours ago but I'm still waiting for an answer from support. 

Is it "normal" for their service standard or is there something weird going on?  Anyone from support/staff follow this thread?

Yes of course. If you have your ticket opened - please, wait and we will resolve this issue.

Yes I have my ticked opened: it's three days now and I only got a generic answer (wallet on mantainance without even an estimated ETA of this mantainance to be completed).

I'd suggest you to get in touch with Mammix2 ( Rubies wallet developer and blockchain specialist) https://bitcointalk.org/index.php?action=profile;u=227772 if you are having issues with RBIES wallet.

So you have answer from us - ok. Yes, sometimes wallet has problems and sometimes we can't give ETA when they going to be fixed by wallet devs. We will do our best to resolve it if it is possible to resolve by us at all.

Yes I had an answer: a lame answer to be honest!

My problem is still unsolved: you are keeping somewhere, unavailable to me, my RBIES I deposit into my c-cex depo address RER4nxzJGniEVukEPNzebQyZ9skKeAUtEv with TX ID 108b031460cc2adf409b16ad445cc84b249c982eb3c9d192e3367dd2f9c152d8

Also please let me know why you closed my ticket (I had to reopen it writing you again) if my problem is still unsolved after 6 days ?!?!

Be aware I checked wallet status before depositing and it was ok but entered in mantainance mode only after I opened my support ticket telling you my depo wasn't showing up.

[Netizen]

Hi,

I want to withdraw some Gridcoins to my wallet, but since almost two days it shows "Maintenance". Two days! Seriously? And why is there no information available about it and how long it's supposed to last?

[c-cex]

Hi,

I want to withdraw some Gridcoins to my wallet, but since almost two days it shows "Maintenance". Two days! Seriously? And why is there no information available about it and how long it's supposed to last?

We have updated our version to "version":"v3.5.8.7-g-research" but is does not sync above "blocks":855000
Already contacted Rob, gridcoin developer. Waiting for reply...